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rcuscale: Make all writer tasks report upon hang

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This commit causes all writer tasks to provide a brief report after a
hang has been reported, spaced at one-second intervals.

Signed-off-by: "Paul E. McKenney" <paulmck@kernel.org>
Signed-off-by: Neeraj Upadhyay <neeraj.upadhyay@kernel.org>
This commit is contained in:
Paul E. McKenney 2024-08-01 17:43:04 -07:00 committed by Neeraj Upadhyay
parent 11377947b5
commit abaf1322ad
1 changed files with 6 additions and 0 deletions
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6
kernel/rcu/rcuscale.c
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@ -483,6 +483,7 @@ rcu_scale_writer(void *arg)
unsigned long jdone;
long me = (long)arg;
struct rcu_head *rhp = NULL;
bool selfreport = false;
bool started = false, done = false, alldone = false;
u64 t;
DEFINE_TORTURE_RANDOM(tr);
@ -593,6 +594,11 @@ rcu_scale_writer(void *arg)
cur_ops->stats();
}
}
if (!selfreport && time_after(jiffies, jdone + HZ * (70 + me))) {
pr_info("%s: Writer %ld self-report: started %d done %d/%d->%d i %d jdone %lu.\n",
__func__, me, started, done, writer_done[me], atomic_read(&n_rcu_scale_writer_finished), i, jiffies - jdone);
selfreport = true;
}
if (started && !alldone && i < MAX_MEAS - 1)
i++;
rcu_scale_wait_shutdown();